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Table 4 Comparison of per level operation lengths and per level EBL in each stage with a Kruskal-Wallis rank test.

From: Intraoperative blood loss during different stages of scoliosis surgery: A prospective study

 

Per level stage lengths

Per level EBL for each stage

 

Dissection

Screw

Correction

Bone grafting

Total

Dissection

Screw

Correction

Bone grafting

Total

Chi-square

1.26

9.609

10.216

1.503

8.223

1.474

0.369

4.862

1.037

0.943

df

2

2

2

2

2

2

2

2

2

2

p value

0.533

0.008*

0.006*

0.472

0.016

0.479

0.831

0.088

0.595

0.624

  1. Ranks 1, 2 and 3 were groups 1, 2 and 3, respectively. df is the degrees of freedom and a * indicates significant differences.
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Scoliosis and Spinal Disorders

ISSN: 2397-1789

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